The object of this study is to show how crucial the cognitively preferred word orders can be for EFL learners. For this, we took two steps. Firstly, in the L2-L1 translation process, the cognitively shared word orders were investigated by means of a questionnaire. Then, in the process that L1 written in these shared word orders was translated into L2, the response time (RT) of these shared orders was measured. The shortest RT of these was thought of as the most cognitively preferred word order, i.e. inter-cognitive mechanism. The results showed that participants overall preferred SV(O-clause) order to S(O-clause)V order as the cognitively preferred word orders. As a result, this study suggests that L2 input can be more effective for word order parameter resetting than L2 word order itself if it is based on the most cognitively preferred word order.